- Total 828 sq mi (2,140 km2)
- Land 520 sq mi (1,300 km2)
- Water 308 sq mi (800 km2)
Highest elevation 2,574 ft (785 m)
Population (April 1, 2010)
- Total 252,409
- Estimate (2016) 260,651
- Density 300/sq mi (120/km2)
Marin County is one of the original 27 counties of California, created February 18, 1850, following adoption of the California Constitution of 1849 and just months before the state was admitted to the Union.
According to General Mariano Vallejo, who headed an 1850 committee to name California’s counties, the county was named for “Marin”, great chief of the tribe Licatiut”. Marin had been named Huicmuse until he was baptized as “Marino” at about age 20. Marin / Marino was born into the Huimen people, a Coast Miwok tribe of Native Americans who inhabited the San Rafael area. Vallejo believed that “Chief Marin” had waged several fierce battles against the Spanish. Marino definitely did reside at Mission Dolores (in modern San Francisco) much of the time from his 1801 baptism and marriage until 1817, frequently serving as a baptism witness and godfather; he may have escaped and been recaptured at some point during that time. Starting in 1817, he served as an alcalde (in effect, an overseer) at the San Rafael Mission, where he lived from 1817 off and on until his death. In 1821, Marino served as an expedition guide for the Spanish for a couple of years before escaping and hiding out for some months in the tiny Marin Islands (also named after him); his recapture resulted in a yearlong incarceration at the Presidio before his return to the Mission San Rafael area for about 15 years until his death in 1839.
Another version of the origin of the county name is that the bay between San Pedro Point and San Quentin Point was named Bahía de Nuestra Señora del Rosario la Marinera in 1775, and that Marin is simply an abbreviation of this name.
The Coast Miwok Indians were hunters and gatherers whose ancestors had occupied the area for thousands of years. About 600 village sites have been identified in the county. The Coast Miwok numbered in the thousands. Today, there are few left and even fewer with any knowledge of their Coast Miwok lineage. Efforts are being made so that they are not forgotten.
Francis Drake and the crew of the Golden Hind was thought to have landed on the Marin coast in 1579 claiming the land as Nova Albion. A bronze plaque inscribed with Drake’s claim to the new lands, fitting the description in Drake’s own account, was discovered in 1933. This so-called Drake’s Plate of Brass was revealed as a hoax in 2003.
In 1595, Sebastian Cermeno lost his ship, the San Agustin, while exploring the Marin Coast. The Spanish explorer Vizcaíno landed about twenty years after Drake in what is now called Drakes Bay. However the first Spanish settlement in Marin was not established until 1817 when Mission San Rafael Arcángel was founded partly in response to the Russian-built Fort Ross to the north in what is now Sonoma County.
Mission San Rafael Arcángel was founded in what is now downtown San Rafael as the 20th Spanish mission in the colonial Mexican province of Alta California by four priests, Father Narciso Duran from Mission San Jose, Father Abella from Mission San Francisco de Asís, Father Gil y Taboada and Father Mariano Payeras, the President of the Missions, on December 14, 1817, four years before Mexico gained independence from Spain.